|
|
|
|
|
The $KEEP member is used to identify the DD statements relating to data sets that must not be scratched during Control-M/Restart processing.
If the JCL of a job contains a DD statement in which the parameter DISP is set to NEW, and the corresponding data set already exists when Control-M/Restart is invoked, Control-M/Restart automatically changes the value of the DISP parameter to OLD.
DD statements are specified in this member in the format shown in Table 32.
Table 32 DD Statements in $KEEP member
Column #s |
Item |
|---|---|
01 through 08 |
job name |
09 through 16 |
procstep name |
17 through 24 |
pgmstep name |
25 through 32 |
DD name |
33 through 80 |
comments (optional) |
Note: The $KEEP member is useful in specifying DD names of checkpoint data sets. When Control-R/RESTART recognizes an existing checkpoint data set specified with DISP=NEW, Control-R does not delete it but changes its disposition to DISP=OLD, enabling the restarted job to use the checkpoint data written by the failed job and to resume processing from the interruption point.
Parent Topic |